📄 Normal
PRIMARY INDICATIONS
1📄 Trauma patient unable to stand or sit upright
2📄 Evaluation of posterior pneumothorax
3📄 Assessment of pleural air–fluid levels
PNEUMOTHORAX
4📄 Occult pneumothorax (posterior air collection)
5📄 Posterior pneumothorax
6📄 Tension pneumothorax (anterior displacement of mediastinum)
PLEURAL EFFUSION & HEMOTHORAX
7📄 Layering pleural effusion
8📄 Hemothorax (posterior dependent fluid)
9📄 Hydropneumothorax (horizontal air–fluid level)
LUNG PARENCHYMAL FINDINGS
10📄 Posterior lung contusion
11📄 Dependent atelectasis
12📄 Aspiration changes (posterior segments)
MEDIASTINAL & DIAPHRAGMATIC FINDINGS
13📄 Retrocardiac pathology
14📄 Posterior mediastinal hematoma
15📄 Diaphragmatic contour abnormality
SKELETAL & CHEST WALL INJURIES
16📄 Posterior rib fractures
17📄 Thoracic spine fractures
18📄 Scapular fractures
DEVICES & TUBES
19📄 Chest tube posterior positioning
20📄 Endotracheal tube depth (limited assessment)
LIMITATIONS & PITFALLS
21📄 Limited lung field coverage
22📄 Patient rotation affecting interpretation
23📄 Inferior image quality compared to CT
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